JYM Supplement Science


24g of Pure, Quality Protein in Every Scoop with No Added Amino Acids or Filler Nutrients
A Pure Blend of High-Quality Proteins in Exact Amounts to Maximize Growth, Recovery, and Repair*
9.2  out of 10  (2,497 Reviews)

Product Overview

Pro JYM. The anabolic protein powder created and used by Dr. Jim Stoppani. High Quality Protein Blend for Maximal Muscle Growth.

"JYM Supplement Science combines real science with best-in-class ingredients and precise doses to deliver unreal results. Pro JYM is my exclusive protein blend designed to help you build muscle, recover faster, and train stronger. Whether you want to boost strength, add size, or get shredded, Pro JYM is for you. It's a powerful blend of proteins that add up to pure muscle fuel."

Grow Like a Pro

Each scoop of Pro JYM delivers 24 grams of pure, quality protein. It’s not "spiked" with single amino acids to artificially increase the protein content or made with cheap and inferior whey protein concentrate or caseinates. To make Pro JYM, I selected only the highest quality whey protein isolate, micellar casein, milk protein isolate, and egg white protein (egg albumin).

The 24 grams of protein in each scoop of Pro JYM contain the following:• Whey protein isolate: 7.5g

  • Whey protein isolate: 7.5g
  • Micellar casein: 7g
  • Egg albumin: 2.5g
  • Milk protein isolate: 7g (5.5g casein, 1.5g whey)

Since milk protein isolate is 20 percent whey protein and 80 percent micellar casein, the 24 grams of protein in Pro JYM are really broken down into three main categories:

Protein chart
A Blend is Best

While a high-quality protein powder should be at the top of everyone's supplement shopping list, don't make the common mistake of buying a pure whey protein powder right off the bat. Yes, whey protein is a critical staple for muscle growth, but to truly maximize growth, you need more than just whey. You need a precise blend of performance proteins.

Whey is a very fast-digesting protein. The rapid rate of digestion is one of whey's benefits, but on its own, this quality can actually be a downfall. Because whey digests so fast, it quickly boosts muscle protein synthesis (MPS). However, it only boosts MPS for a short amount of time.

Research now shows that when you add medium-digesting and slow-digesting proteins to whey, muscle protein synthesis remains elevated for longer than when using whey alone. Since muscle protein synthesis leads to muscle growth, elevating muscle protein synthesis for longer can have a significant impact on your overall gains.

In fact, research suggests that people who add slow-digesting casein protein to a whey protein shake around their workouts enjoy greater muscle growth over time than people taking whey alone. This research is the very reason I recommend taking a blend of fast-digesting whey protein, medium-digesting egg protein, and slow-digesting micellar casein.

Say No to Protein Spiking!

Many supplement manufacturers cut corners on their protein powders because high-quality protein is very expensive to make. They often use a dirty trick called “nitrogen spiking.” Nitrogen spiking, also called “amino spiking” or “protein spiking,” is a way to manipulate the test used to measure the protein content of protein powders.

The current method used to assess the amount of protein in a protein powder involves measuring the nitrogen content, which is then converted into protein amount. Nitrogen is used because protein is made of amino acids strung together in a chain, much like a pearl necklace, and every amino acid contains nitrogen. If manufacturers add loose amino acids to a powder, they can fool the test and deliver less pure protein than their labels claim.

Many people think that extra amino acids in their protein powder are beneficial. The major problem, however, is that certain amino acids are not added to make the protein powder more effective. Instead, they're simply added for their nitrogen. Most single amino acids, such as taurine and glycine, are much cheaper than whey protein, casein protein, milk protein, or egg protein. Even highly beneficial amino acids like BCAAs and glutamine are cheaper than protein powder. So, by adding a bunch of cheaper amino acids to their protein powders, supplement companies can boost their nitrogen content, which technically means they boost the amount of protein per serving, at least according to the nitrogen test.

Because the added amino acids are not complete proteins, the protein content of a spiked protein powder is not truly what a nitrogen test claims it is. For example, a whey protein powder may claim to contain 20 grams of protein per scoop. However, if the manufacturer added 5 grams of glycine per serving, then you are only getting 15 grams of actual whey protein and 5 grams of glycine, which would read as 20 grams of protein per serving.

An even bigger problem arises when proteins are spiked with amino acids that aren't used as building blocks to form proteins in the body. Taurine is once such amino acid. Taurine helps with energy production, so you might first be excited to see a high quantity of it in your protein. However, if 5 grams of taurine has been added to your protein powder that claims to contain 20 grams of protein per serving, you are only getting 15 grams of real protein and 5 grams of taurine. So the extra taurine comes at the expense of total protein.

If your favorite protein powder lists BCAAs, glutamine, beta-alanine, betaine (trimethylglycine), or creatine, you might think it’s a great product because of the additional nutrients. Yes, your protein contains these performance nutrients, but you may be getting them at the expense of the protein, not in addition to the protein. All those ingredients are nitrogen-containing compounds that count towards the total protein amount listed on the label. You might be getting up to 10 grams less protein per serving than listed on the label.

The rampant use of nitrogen spiking is the main reason why I list the precise amount of each protein in every 24 gram serving of Pro JYM. Whey protein isolate makes up 7.5 grams, micellar casein makes up 7 grams, and milk protein isolate makes up 7 grams, and the remaining 2.5 grams comes from egg white protein (egg albumen). That totals 24 grams from complete proteins with no added amino acids or filler nutrients.

The Power of Pro

As with every other supplement in the JYM line, I want you to know the exact ingredients and doses in Pro JYM. I want you to see that it contains nothing but a pure blend of high-quality proteins in the exact amounts needed to maximize growth, recovery, and repair. In short, I want you to grow like a pro.

Prepare to experience the power of real science, real ingredients, and unreal results.

Hit the JYM!

Jim Stoppani, PhD
Owner, JYM Supplement Science

JYM Supplement Science

Ratings & Reviews

Overall Rating
2,497 Ratings
Verified Buyer Rating
2,268 Ratings
Average Flavor Rating
14 Flavors
Top Rated Flavor
By clicking the button above, you agree to entering the Reviews section. Products in the Store are not intended to diagnose, treat, cure, or prevent any disease.
Mar 09, 2019
Verified Buyer

I've wrote a review on Pro Jym before but wanted to submit my views on the new Choc Peanut Butter. The peanut butter taste is very subtle. It sort of tastes like a Reese's peanut butter cup. Doesn't taste artificial and chemically like some other brands. Another quality flavor from Jim.

Mar 08, 2019
  • 9 Root Beer Float

Other than the chalky taste after several weeks of using this product I have been noticing a difference in my recovery. I am impressed. I will definitely be exploring the different flavors before settling on one. I am sold on this Brand for all my supplementation needs.

Mar 04, 2019
Verified Buyer
  • 7 Tahitian Vanilla Bean

Digest easily, no big issues here but I have a big problem with the yield!!! 60% of protein per serving is quite weak add to that all the gum things and additives!!! This can be a superb product if you just cut all the additional things we don’t NEED!!!

Mar 03, 2019
Verified Buyer
  • 9 Chocolate Cookie Crunch
  • 7 Caramel Macchiato
  • 7 Cookies & Cream
  • 8 Root Beer Float
  • 10 S'mores
  • 10 Tahitian Vanilla Bean

A must have!!!!!!! I drink several servings daily... can't get enough of this! The taste alone feels like a cheat meal! I mix/ match flavors together even..... so good! The results speak for themselves too!!

Mar 02, 2019
Verified Buyer
  • 10 S'mores

I have been purchasing Jym back when they had legacy flavors and I've been using the products through the various formula changes since 2016. This is pretty much one the best tasting, most drinkable and best mixing shake on the market. One of the biggest reasons for any protein shake to be excellent in any those characteristic is due to whatever creamer they use. My diet is typicaly low carb and high fat, so the added creamer is not really a concern and welcomed. This product will do fine with just water, or sometimes i'll do a splash of almond milk to add color. This powder can even pass as a dessert in my opinion which kills two birds with one stone - for satisfying sweet tooths and hitting protein goals. I higly recommend the smores. I was skeptical when the Smores flavored returned, but I finally took a chance recently and ordered it after a 2 year hiatus and luckly it's just as awesome as it was in 2016. I like the Tahitian Vanilla for cooking (protein pancakes). My husband like the mint chocolate chip and mocha. The other flavors are alright, like the root beer float, banana, cookie crunch, cookies and cream but the smores will also be my go-to. Those little marshmellows bring out the best in me

Feb 28, 2019
Verified Buyer
  • 7 Chocolate Cookie Crunch

The legacy chocolate cookie crunch was the most delicious thing I had ever tasted...ever since they came back to bodybuilding and switched to the coconut creamer there is quite an obvious drop in all chocolate-based flavors, especially this one. I would liken it to have chocolate milk as the base flavor and now it is more like chocolate pudding as the base. It still tastes good, but knowing how AMAZING the original one was, I wish it were back to that, and then I wish I could taste the chocolate peanut butter with the original creamer used as well! The caramel macchiato is phenomenal. It is now my favorite due to the obvious drop in taste of chocolate cookie crunch

Feb 27, 2019
Verified Buyer
No written review.
Feb 26, 2019
  • 9 Chocolate Cookie Crunch

So whoever may concern I have been drinking Jym stoppani for quite a while and I do not know if I see any changes yet I has protein is very great and it tastes very great I'm going to give it a chance still see what happens

Feb 26, 2019
Verified Buyer
  • 10 S'mores

I am VERY picky and I’ve ALWAYS hated protein shakes because they taste so gross to me but this brand is MY FAVORITE. I take my shake with milk. This Tastes just like a glass of chocolate milk Plus it has lil marshmallows! So delicious! Definitely helps with soreness. Can’t live without this.

Feb 25, 2019
Verified Buyer
  • 10 S'mores
  • 10 Caramel Macchiato
  • 10 Root Beer Float

Hands down, this protein, (and all of the Jym line) are grade A products. Yes, they may cost a little extra. But we all know you get what you pay for. This protein in taste alone is amazing! It’s thick and delicious and has an amazing taste! No filler, high quality ingredients.

Feb 23, 2019
Verified Buyer
  • 9 Chocolate Cookie Crunch
  • 7 Tahitian Vanilla Bean

The flavors are very tasty with a very gritty like texture which sticks to your cup, mixibility is very poor. Ive seen pretty good results regardless.

Feb 19, 2019
Verified Buyer

Whoever the tool is that wrote that because it has a Prop 65 warning on it, makes it dangerous is an idiot. EVERYTHING from California has that warning on it. Pro Jym is superb!

Feb 17, 2019
  • 10 Natural White Chocolate Raspberry
  • 10 Mint Chocolate Chip

Love PRO Jym, use it before and after work outs with every product from the JYM line. This is hands down the best stuff, and the new choco peanut butter flavor is amazing. I also like using all the "Natural" flavored products too, the white choco and ras is really tasty too.

Feb 17, 2019
Verified Buyer

Great flavour. It’s a toss up between this flavour and. S’mores.

Feb 14, 2019
  • 10 Chocolate Cookie Crunch

Mixes easy with just a spoon. Its a little different than the old recipe but still good.

2 Sizes
907 Grams
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Banana Cream Pie
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Price: € 28,99  (€ 1,11 / Serving)
Flavor Rating: 6.8

What's in JYM Supplement Science Pro JYM

Serving Size: 1 Scoop (35g)
Servings Per Container: About 26
Amount Per Serving % Daily Value
Calories 140       
Calories From Fat 25       
Total Fat 2.5 g 4%**
Saturated Fat 2.5 g 13%**
Cholesterol 15 mg 5%
Total Carbohydrates 4 g 1%**
Sugars 1 g
Protein 24 g 48%**
Calcium 412 mg 41%
Sodium 120 mg 5%
Potassium 115 mg 3%
** Percent Daily Values are based on a 2000-calorie diet.
† Daily value not established.
Protein Blend (Whey Protein Isolate, Micellar Casein, Milk Protein Isolate, Egg Protein), Coconut-Based Creamer (Coconut Oil, Maltodextrin, Food Starch, Mono- and Diglycerides, Tricalcium Phosphate), Natural And Artificial Flavors, Gum Blend (Cellulose Gum, Xanthan Gum, Carrageenan), Sucralose, Acesulfame Potassium, FD&C Yellow No. 5, Silicon Dioxide, Sunflower Lecithin.
ALLERGEN WARNING: Contains EGG and MILK. Produced on shared equipment that also processes products that contain SOY, TREE NUTS, and WHEAT ingredients.

Directions For Pro JYM: Mix each scoop of Pro JYM in 6-12 oz. of water or milk depending on your preference for thickness and texture. Consume 1-2 scoops within 30 minutes before workouts, and 1-2 scoops within 30 minutes after workouts. Also consider taking 1-2 scoops when you first wake up each day and before going to bed for maximizing lean muscle mass gains. You can also consume 1-2 scoops between regular meals.

Warnings: Do not use as a sole source of nutrition. Do not exceed the recommended daily dose. Keep out of reach of children. Check with a qualified healthcare professional before taking this product if you are pregnant, nursing a baby, under 18 years of age, or if you have any known or suspected medical condition(s) and/or are taking any prescription or OTC medication(s). Concerning California Residents: This product contains a chemical known to the State of California to cause cancer, birth defects, or other reproductive harm.

* These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
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